Did they say that with a straight face? I can't believe that would be serious advice! "You literally need to contact everyone in your address book and make sure they have the right settings."
You're wrong, and the comment you replied to is right. According to Apple, it can take up to 45 days to receive text messages from Apple products after you turn iMessage off.
This was the experience of the person who initiated the class action suit:
"21. Apple personnel informed Plaintiff that even though she had turned iMessage off in her old iPhone she may still not be receiving all her text messages because some texters using Apple devices may not be using the latest Apple iOS version. Rather than Apple coming up with a solution to a problem created by Apple, Apple's representative instead suggested to Plaintiff that Plaintiff get her text message senders to update their Apple iOS to the latest version, or have them delete and then re-add Plaintiff as their contact, or have Plaintiff and these unsuccessful Apple texters start a new text conversation with Plaintiff."
I don't know why your submission wasn't visible (you might want to contact the PH team directly about that), but with regards to your point about the startups trending that have existed for months: it doesn't matter when you launched, it matters when you were discovered by someone who uses PH and then decides to submit you. All links are hand picked, but they're hand picked by members of the community, then voted on by the community.
> hand picked by members of the community, then voted on by the community
I'm looking over the submitters' profiles and I see many of the same people submitting different items... so I'm deducing that 'members of the community' != 'the community'.
That's because, like Hacker News, there are a relatively small amount of people who actually submit when compared to the number of people in the community as a whole. I personally subscribe to quite a lot of startup newsletters and follow people on Twitter who post product-related news, so I tend to have things to post most days. I assume it's the same for other people who also post on a regular basis.
People will use it for different things. Some will submit products, some will upvote, some will comment and get involved with the discussion, and some will do all three.
I don't know that this is true for Show HN posts (since it's a comparable product). It seems most Show HN's are posted by the creators. And Product Hunt is the other way around because most creators are not allowed to post there.
I think trying to promote your YC startup amongst your fellow batch members is different to asking the tech community as a whole to vote for your product. Perhaps "founders told each other to upvote their products" wasn't the best way of phrasing it, but I imagine it was more like how you'd ask those closest to you to give you a bit of support.
With regards to the conflict of interest, I don't see this being too much of an issue. Whilst PH itself is part of a YC batch, the majority of the PH community won't be, and it's them who collectively vote.
The issue is momentum: with HN/Reddit's time-based ranking algorithms, the first few upvotes are extremely critical. On Hacker News for example, getting ~5 upvotes in the first hour for a otherwise-unexciting product will usually have it touch the front page, and that could be hit with just little collusion.
Getting the rest of the upvotes and the traction to hit the top of the front page, in fairness, is dependent on non-collusive votes. The issue is that subtle collusion may get products exposure when they otherwise wouldn't in a fair system. (although, that's the startup world in a nutshell. I'm not fond of it.)
I think a lot of this won't be dependent on whether or not the submission is for a YC company, especially since the submitter is often not associated with the product being submitted anyway. I do agree with you about the practice being part and parcel of the startup world though!
https://goo.gl/forms/YIiYFCxhD8niiF1w1